Electric riveting-machine.



A. C. TAYLOR ELECTRIC RIVETING MACHINE.

APPLICATION FILED SEPT. 119.1916- Patented Apr. 9,1918.

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ELECTRIC RI'VEHNG MACHINE.-

APPLICATION FILED SEPT. 19. 1916.

1,26 1,97 1 Patented Apr. 9, 1918.

3 SHEET$$HEET 2- Ac. Tizyior.

;-J t WI THESE. ATTORNEYJ A. C. TAYLOR.

ELECTRIC RIVETING MACHINE.

APPLICATION FILED SEPT-19,1916- Patented Apr. 9, 1918.

3 SHEETSSHEET 3- Zor.

WIT/V555.

UNITED STATES PATENT OFFICE.

ALBERTIS C. TAYLOR, OF WARREN, OHIO, ASSIGNOR TO THE 'WINFIELD'MANUFAC- TUBING COMPANY, OF WARREN, OHIO, A CORPORATION.

ELECTRIC RIVETING-MACHINE.

Specification of Letters Patent.

Patented Apr. 9, 1918.

To all whom it may concern:

Be it known that I, ALBERTIS C. TAYLOR, a citizen of the United States, residing at Warren, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Electric Riveting-Machines, of which the following is a specification.

In this machine the riveting proceeds with successive manual and power operations, and the invention resides in the novel and original mechanism by which the riveting is accomplished, all substantially as shown and described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front elevation of the machine and Fig. 2 is a sectional elevation thereof, front to rear. Fig. 3 is a plan view. Fig. 4 is a cross section on line 4-l, Fig. 5, and illustrating a portion of the clutch mechanism by which power is utilized to finish the riveting. Fig. 5 is an elevation of the clutch mechanism with the band wheel removed and looking from that direction inward. Fig. 6 is a sectional elevation of the clutch mechanism on the line of the main shaft, and Figs. 7 and 8 are details of the bolt and plunger in said mechanism as hereinafter described.

The structure shown comprises a main frame F and two practically independent lines of mechanism leadin to the immediate riveting members, electro es or dies at and I). These members or electrodes are suitably shaped at their points to engage the rivet r between them, the upper member being adapted, in this instance, to upset the unheaded end of the rivet while the head proper rests in or upon the point of the lower member 6, the rivet having been first engaged through the stock 8.

In the operation the first step is to bring the two electrodes into position on the rivet as seen in Fig. 2, and this is accomplished through the short lever 2 which is fixed to head It and carries the upper electrode a. The said head is adapted to slide in suitable guides g, Fig. 1, at its edges and is balanced over sheave S by cord or cable is and counterweight 'w. Hence, by gripping lever 2 the operator can easily raise and lower said head it under the counter-balancing thus provided and the head will simply rest Where he moves it, up or down. The said sheave is supported upon a suitable standard upon the main frame at an inclination to the side thereof relatively as seen in Fig. 3 so as to bring the same into right working relations and clearance as to the other parts. Otherwise there is no importance attached to this relation or position.

The main operating lever 3 is designed, first, to throw the electric current into the transformer, shown in a general way at t, Fig. 2, and which is effected through the switch lever 13 and the two contacts a and 0, so that after the electrodes are closed upon the rivet and the current is turned on the rivet is instantly heated and upsetting proceeds by a further depression of lever 3.

It will depend on the degree or measure of pressure the operator exerts as to how thoroughly the work is done, but in any event, the riveting is not regarded as completed until the finishing stroke or pressure has been applied by power. The present plan 01 the machine contemplates a single power stroke as suiiicient, but additional strokes can be made if required and as hereinafter described. Power is obtained through main shaft m and the band or like wheel n thereon, and automatic clutch mechanism for said shaft is shown in Figs. 4, 5 and 6. Power is communicated from said shaft to head it through the pivoted communicating member or arm d which is operated by a coupling rod or hanger 7 engaged over or upon a slight crank 8 on shaft m.

Now, to be more explicit as to these details, hand lever 3 is shown as pivoted at 9 near its inner end on head 72. and held in raised position by a coiled spring 10 against stop screw 12. The short end of said lever engages the electric switch or arm 13 which carries the upper of the two contacts 0 and c for closing the electric circuit on the transformer, and a spring 15 holds said arm normally up out of contact. A stop 16 limits the tilt or swing of said arm as well as serving as an indirect fulcrum for lever 3 when arm 13 is engaged against said stop.

lVorking engagement of member d with head it is effected through a bolt 18 occupying a bore therein and adapted to be thrust outward into engagement with a lug 19 on the bar or part 20 at the rear of head it by a spring behind said bolt. The bar 20 has a threaded stem at its top engaged through a rearwardly projecting portion 21 at the fixed rod or projection 24 is arranged to engage a trigger 25 in said member d to rei 1 19'. TIow,

tract the bolt 18 when disengaged from having this line of power mechanism in view and assuming that electrode a is 'down upon the rivet through the action of lever 3, a power stroke will sup lement the action of said lever and comp ete the riveting operation. The said mechanism is thrown into action by means of the treadle 26, which has, link and lever connections extending to a clutch on the main shaft adapted to engage the'wheel n, and the said clutch will be automatically disengaged in a single revolution of said wheel but the stroke may be re eated by a second depression of the tread e. The total stroke through member d is comparativel short but sufiicient to complete the riveting and the part 20 may be raised and lowered more or less to more or less increase said stroke.

The details of the clutch appear especially in Figs. 4, 5' and 6, and control from treadle 26 is through rod 30, lever 31 and rod 32 operatively connected with the treadle and which serves to throw the clutch into action. Wheel n is free on shaft m and has a recess or hole 34 in its hub adapted to be entered by a lock bolt 33 slidably mounted in a collar 35 fixed on shaft on and rotating therewith. The said collar carries a cam 36 adapted in its rotation to engage the beveled head 37 of detent 38 and thereby withdraw said detent from engagement with the spring pressed plunger 39. 'Said plunger normally engages in a recess in bolt 33 and holds said bolt back against its own spring 41 out of engagement with wheel n. The said detent is pivotally mounted in the side of pivoted lever 40, and a spring 43 holds said detent normally in engagement with the plunger 39. Springs 42 thrust the plunger into engagement with bolt 33 when said bolt is retired. In this position of the parts the power shaft is at rest, and the said clutch mechanism remains idle while the work proceeds through lever 3. Power is then applied through the said trip and clutch mechanism by release of plunger 39 from the bolt 33 and the shooting of said bolt into engagement with wheel at on the first revolution thereof. In this operation an initial lift movement on lever 40 occurs through the trip mechanism and plunger 39 is forcibly depressed through the lug 45 engaged in a corresponding recess in the plunger and whereby bolt 33 is released as described. Then as a single rotation of the shaft is made and the finishing blow upon the rivet through the die members a and b is obtained, retirement of bolt 33 proceeds by first releasing the depressing detent from date any undue strain that might otherwise come on to the riveting members.

What I claim is:

1. An electric riveting machine as described having a pair of opposed riveting electrodes, an electric switch, and manually controlled mechanism to effect initial heating and rivetin by an automatic operation of said switch uring a pressing movement of one electrode, and power means to complete the work.

2. An electric riveting machine as described having means to bring two electrodes to bear on a rivet and means co-acting therewith to pass an electric current through the rivet and electrodes automatically when a bearing relation has been es tablished, in combination with power means to impart additional pressure movement to the electrodes to comp ete the riveting.

3. An electric riveting machine having -means tov close a pair of electrodes on a rivet, separate means to turn on the current and to upset the heated rivet and power means to complete the riveting.

4. An electric riveting machine as described, having-a fixed and a movable electrode, means to lower the movable electrode to closed position upon a rivet, a lever and means co-acting therewith to turn on the current automatically and to upset the rivet upon applying additional manual pressure to said lever, and-power mechanism to finish the'riveting.

5. An electric riveting machine as described having a slidable head and an electrode carried thereby, means to depress said head having supplemental means in automatic co-acting relation therewith to close the electriccurrent on said electrode and to exert a downward pressure thereon simultaneously, whereby the rivet is upset initially, and a power device to impart additional movement to said head and electrode.

6. An electric riveting machine as described, having a sliding head and an electrode thereon and a counterbalance, connected with said head, a hand lever to operate said head and separate means to turn the electric current on said electrode.

7. An electric riveting machine having a head and a counter balance connected therewith and an electrode on said head, means to raise and lower said head and separate means to throw an electric current into said electrode and to upset the rivet.

8. An electric riveting machine having a head and an electrode thereon and means to raise and lower the said head, in combination with means to throw the electrode into an electric circuit comprising a lever pivotally mounted on said head, and an electric switch having operable connection with said lever to permit an upsetting pressure on the rivet through said electrode subsequent to a closing operation of said switch by the same lever.

9. An electric riveting machine as described having a depressible electrode and a pivoted electric switch member to throw an electric current thereon, and a lever pivoted adjacent said member having the function of exerting a downward pressure on said electrode and a closing movement of said switch.

10. An electric riveting machine as described having a pair of riveting electrodes and means to bring the same into contact with a rivet, an electric switch to turn the current on said electrodes, a single pivoted lever to impart movement to one electrode and said switch, and power actuated mechanisms adapted to impart additional pressure upon the rivet through said electrodes.

11. An electric riveting; machine having power means to upset the rivet, a treadle and a clutch operated thereby adapted to be engaged with said power mechanism and means to automatically disengage said clutch 12. An electric riveting machine having means to upset a rivet comprising a shaft and a power driven wheel free thereon, a clutch on said shaft adapted to engage said wheel and means to atutomatically disengage said clutch.

13. An electric riveting machine as described having a pair of electrodes adapted to engage a rivet and means to turn the current thereon, in combination with power mechanism to force the electrodes on the rivet comprising a driven wheel and a power shaft and a clutch on said shaft having a bolt adapted to engage said wheel.

14. An electric riveting machine having a pair of electrodes adapted to engage the rivet and means to close the electric circuit thereon, in combination with power mechanism adapted to depress one of said electrodes comprising a shaft and a wheel thereon, a clutch on said shaft having a bolt to engage said wheel, and a device adapted to retire the bolt from engaging position and to lock the bolt in retired position.

15. An electric rivetin machine having a fixed lower electrode an a movable upper electrode, a slidable head carrying said upper electrode, a counter balance for said head, a lever adapted to raise and lower said head, contact mechanism to close the current on the electrodes and a lever to actuate said mechanism and to bring the electrodes into upsetting relations on the rivet.

16. In an electric riveting machine, a main frame, a slidable head and means to promote uplift thereof, a lever pivoted on said head and carried thereby,'an electrode mounted upon said head, and a second electrode stationed beneath said first electrode, in combination with an electric switch to control the passage of current to said electrodes mounted upon said frame in engaging relation with said lever.

17. In an electric riveting machine, a main frame having a counterweighted head slidably mounted thereon, a lever pivoted upon and an electrode carried by said head, a second electrode and means supporting the same in a yielding position beneath said first electrode, and power-applying means having striking engagement with said head to impart a finishing blow in riveting operations, in combination with an electric switch mounted upon said frame in co-working relation with said lever to control the current passing through said electrodes.

18. An electric riveting machine, comprising a slidable head having a riveting electrode mounted thereon and provided with an adjustable part adapted to efiect movement thereof, in combination with an oscillating member having a bolt adapted to engage said adjustable part and operate said head.

19. An electric riveting machine, comprising a slidable head having an electrode secured thereto, an oscillatory member having a bolt to engage said head, a trigger to retire said bolt, and means to operate said trigger in one position assumed by said oscillatory member.

20. An electric riveting machine, comprising an electrode, a slidable head carrying said electrode, a bar adjustably fixed upon said head, an oscillatory member having a bolt adapted to engage said bar, means to effect withdrawal of said bolt in one position of said oscillatory member relatively to said bar, and power means to impart osc1llatory movement to said bar at intermittent intervals.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERTIS O. TAYLOR.

Witnesses:

A. ELVONDRES, J. H. EWALT. 

